The appointment request for General, Family and Cosmetic Dentist Bakersfield, CA |... can be taken as a reference
Here we added a separate field a checkbox to which if checked displays the contact number.
We added a custom JS function todo the following
$(".answer").hide();
$(".phone").click(function() {
if($(this).is(":checked")) {
$(".answer").show();
} else {
$(".answer").hide();
}
});
The button click action on class 'phone' triggers 'answer' class to show which contains the phone number.